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The greenest parks in America

The greenest parks in America

All across the country, national parks are doing their part to make environmentally friendly updates. Here are the 10 parks in the U.S. taking steps to be the greenest spaces in America. (Text: Tracy Alverson-Euler)

The greenest parks in America

All across the country, national parks are doing their part to make environmentally friendly updates. Here are the 10 parks in the U.S. taking steps to be the greenest spaces in America. (Text: Tracy Alverson-Euler)